//
//  CZUserAccount.swift
//  Weibo30
//
//  Created by apple on 16/8/9.
//  Copyright © 2016年 itcast. All rights reserved.
//

import UIKit
//  用户账号模型, 使用kvc字典转模型
class CZUserAccount: NSObject, NSCoding {
    //  用户授权的唯一票据
    var access_token: String?
    //  access_token的生命周期，单位是秒数。
    var expires_in: NSTimeInterval = 0 {
        didSet {
            //  过期时间 = 获取accesstoken那一刻起的时间 + 过期秒数
            //  dateByAddingTimeInterval函数的意思在当前时间的基础加上多少秒
            expiresDate = NSDate().dateByAddingTimeInterval(expires_in)
            
        }
    }
    
    //  过期时间
    var expiresDate: NSDate?
    
    //  授权用户的UID
    var uid: Int64 = 0
    //  用户名
    var name: String?
    //  头像
    var avatar_large: String?
    
    //  kvc构造函数
    //  AnyObject 好比oc里面id类型,表示任意对象类型
    init(dic: [String: AnyObject]) {
        
        super.init()
        setValuesForKeysWithDictionary(dic)
        
    }
    //  防止字段不匹配,导致崩溃
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
        
    }
    //  重写description
    override var description: String {
        
        let keys = ["access_token", "expires_in", "uid", "name", "avatar_large"]
        
        return dictionaryWithValuesForKeys(keys).description
    }
    
    
    //  归档
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        aCoder.encodeInt64(uid, forKey: "uid")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
    }
    //  解档
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expiresDate = aDecoder.decodeObjectForKey("expiresDate") as? NSDate
        uid = aDecoder.decodeInt64ForKey("uid")
        name = aDecoder.decodeObjectForKey("name") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
    }
    //  调用该方法保存用户对象到指定沙盒路径
    func saveUserAccount() {
        //  设置保存路径
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("userAccount.archive")
        
        //  执行归档
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    
    }
    //  类函数
    class func loadUserAccount() -> CZUserAccount?{
        //  设置保存路径
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("userAccount.archive")
        
        //  执行解档
        return NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? CZUserAccount
    }
    
    
    
}
